from tkinter import *

root = Tk()

v = IntVar()

Radiobutton(root, text = 'One', variable = v, value = 1).pack(anchor = W)
Radiobutton(root, text = 'Two', variable = v, value = 2).pack(anchor = W)
Radiobutton(root, text = 'Three', variabl = v, value = 3).pack(anchor = W)

mainloop()
